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首页> 外文会议>7th Biennial Conference on Engineering Systems Design and Analysis 2004(ESDA 2004) vol.1: Advanced Energy Systems; Advanced Heat Transfer in Engineering Systems; ... >COMPUTATION OF NONLINEAR AND EDGE EFFECTS IN A THERMOACOUSTIC REFRIGERATOR
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COMPUTATION OF NONLINEAR AND EDGE EFFECTS IN A THERMOACOUSTIC REFRIGERATOR

机译：热声制冷机中的非线性效应和边缘效应的计算

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摘要

In thermoacoustic refrigerators, the acoustic energy provided by an acoustic source is used to pump heat from a cold reservoir. Such refrigerators work with benign fluids, and may possibly be miniaturized, offering an application to microelectronic refrigeration. The linear theory frequently used to predict thermoacoustic refrigerators performance, because it relies on the simplification of the governing equations, can not account for all the phenomena involved in thermoacoustic heat pumping. In the present work, the full compressible two-dimensional Navier-Stokes equations are solved numerically, and the flow and heat transfer above a plate immerged in an acoustic standing wave are computed. Some phenomena, which are not taken into account in the linear theory, are observed. Non-harmonic temperature variations are found and are explained using the results of a former nonlinear analysis. The effect of vortical motions at the extremity of the stack plates on heat transfer is studied.
机译：在热声冰箱中，声源提供的声能用于从冷库中抽出热量。这样的冰箱使用良性流体工作，并且可能被小型化，从而将其应用于微电子制冷。线性理论经常用于预测热声制冷机的性能，因为它依赖于控制方程式的简化，不能解释热声热泵所涉及的所有现象。在目前的工作中，对可压缩的二维Navier-Stokes方程进行数值求解，并计算了浸没在声驻波中的平板上方的流动和热传递。观察到一些在线性理论中未考虑的现象。发现非谐波温度变化，并使用以前的非线性分析结果进行解释。研究了在叠层板末端的涡旋运动对传热的影响。

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